x/3 = -30
Multiply both sides by 3
x = -90
cross multiply 3/6=y/10 30=6y y=5
x=12
(3,3)
n=-4/3
Is it 15 over 40?
There are 10 mm in 1 cm, so there are 30 mm in 3 cm.
5 7 --- = ---- 3+1 6 ________________ 5 7 --- = --- 4 6 _______________ 4*7 = 5*6 28 = 30 28=/=30 False equation
x2 + 13x = -30 ∴ x2 + 13x + 30 = 0 ∴ (x + 3)(x + 10) = 0 ∴ x ∈ {-3, -10}
n=3,y=4 2(n+3y)=30
2/3 equals 20/30 7/10 equals 21/30 2/3 is less than 7/10.
-3/10x = -9Multiply each side by 10x:-3 = -90xDivide each side by -90:x = -3/-90 = 1/30
3/7=x/63 189=7x 27=x